http://www.bbc.com/news/election-us-2016-37953528
All you have to do to win elections is to spout blatant lies that appeal to greed and right-wing extremists. They'll be mad once they discover those were lies, but by then it's too late. And the next elections all you need to do is rinse and repeat as their memory isn't good enough to remember the previous elections.
Brexit also passed because of all the promises that were made regarding all the money that it would free. They didn't even wait a day after winning before mentioning that those claims were BS and that they had lied about it.
The right-wing party that won the elections in the Netherlands years ago did so by claiming they'd give working people each a thousand euros tax-free in the first year. Of course they never did, and blamed it on the economy
The right to vote should require an IQ test..